2066220706481 has 4 divisors (see below), whose sum is σ = 2069290871652. Its totient is φ = 2063150541312.

The previous prime is 2066220706469. The next prime is 2066220706513. The reversal of 2066220706481 is 1846070226602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1544156654881 + 522064051600 = 1242641^2 + 722540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066220706481 - 2²⁶ = 2066153597617 is a prime.

It is a super-2 number, since 2×2066220706481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066220706411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535081576 + ... + 1535082921.

It is an arithmetic number, because the mean of its divisors is an integer number (517322717913).

Almost surely, 2^{2066220706481} is an apocalyptic number.

It is an amenable number.

2066220706481 is a deficient number, since it is larger than the sum of its proper divisors (3070165171).

2066220706481 is an equidigital number, since it uses as much as digits as its factorization.

2066220706481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070165170.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 2066220706481 in words is "two trillion, sixty-six billion, two hundred twenty million, seven hundred six thousand, four hundred eighty-one".